Cooltube as vent...

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SparkeySTi

Active Member
Im doing a grow room with a 400w HPS. Im going to use a cooltube hooked to a 265CFM fan. My thought is have the light in the middle of the room, then have one end open, the other have ducting to lead to the fan, and from the fan exhaust the hot/smelly air into a DIY carbon filter...

Will it work?
 
Arrid

Arrid

Well-Known Member
SparkeySTi said:
Im doing a grow room with a 400w HPS. Im going to use a cooltube hooked to a 265CFM fan. My thought is have the light in the middle of the room, then have one end open, the other have ducting to lead to the fan, and from the fan exhaust the hot/smelly air into a DIY carbon filter...

Will it work?
Click to expand...

You're supposed to have ducting, pulling cool air from outside the grow room, though your lighting and then though more ducting and out of the grow room.

The fan pulls the hot air from inside the lighting area to the outside, thus cooling it down.

like below..



I was kind enough to draw a picture. :)
 

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EyezofSnake

Well-Known Member
SparkeySTi said:
Im doing a grow room with a 400w HPS. Im going to use a cooltube hooked to a 265CFM fan. My thought is have the light in the middle of the room, then have one end open, the other have ducting to lead to the fan, and from the fan exhaust the hot/smelly air into a DIY carbon filter...

Will it work?
Click to expand...

I first started off cooling my light with air from outside the growbox, and doing the active exhaust/passive intake routine. Temps were okay, but could be better.

I changed it to having the fan suck air out of the grow room, through the light, and into a carbon filter. I also have reversed my previous exhaust fan to become an intake fan. This setup gives me the most consistent temperatures, and it doesn't smell at all.

So in short, yes it works just fine.
 
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SparkeySTi

Active Member
EyezofSnake said:
I first started off cooling my light with air from outside the growbox, and doing the active exhaust/passive intake routine. Temps were okay, but could be better.

I changed it to having the fan suck air out of the grow room, through the light, and into a carbon filter. I also have reversed my previous exhaust fan to become an intake fan. This setup gives me the most consistent temperatures, and it doesn't smell at all.

So in short, yes it works just fine.
Click to expand...

Thanks! That sounds exactly like what i want to do...
 
RaginCajun420

RaginCajun420

Well-Known Member
I have a 400 watt hps in a Homebox Clonebox. I have my 300 cfm fan pulling through the carbon filter, which hangs inside the box, then pushing air through ducting to my cool tube then from my cool tube out the box. Works great! The highest my temps get is 81.
 
mrbuzzsaw

mrbuzzsaw

Well-Known Member
Arrid said:
You're supposed to have ducting, pulling cool air from outside the grow room, though your lighting and then though more ducting and out of the grow room.

The fan pulls the hot air from inside the lighting area to the outside, thus cooling it down.

like below..



I was kind enough to draw a picture. :)
Click to expand...

i have seen others put the filter then cooltube then out as well.

it is usually filter with fan cooltube then out.
 
sublimed

sublimed

Well-Known Member
that's the exact setup i have, but with two 70w hps's in the cooltube.

with the two hps' and 2 20w cfl's in a 1.5x2.5x2.0 cab, and only a passive intake, it runs at 80F, when i get an intake fan it should drop to 75 ish.
 
murtymaker

murtymaker

Well-Known Member
What about if your using CO2? It would get to hot and smelly if you turned off the exaust fan to let the CO2 work it's magic ya?
 
Charred

Charred

Well-Known Member
ideally you want a small inline fan(40$ from bghydro) pulling air in from outside your grow box, through ducting, pass the light which is therefor cooled down and then the hot air is pulled out the other side of the cooltube and through the duct and out the other side of your box.
this will result in your light being dramatically cooler and therefor allowing your plants much closer to the light:joint: :joint:and also preserving your globes life span.
then have your bigger fan ducted up to your carbon filter, pulling air through the filter and out your room.
i go with just passive intakes in this situation and works well for me:blsmoke:
 
sublimed

sublimed

Well-Known Member
do you put the passive intake holes on the bottom?

also, do you have a fan for circulation and directed on the plats?
 
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SparkeySTi

Active Member
Wow... you guys are getting crazy with this. We understand how they work... but what about different ways then the norm? Thats what i was getting at... DIFFERENT ways to run a cool tube... for those with less money/space. And a circulation fan is irrelevant...
 
blackcoupe01

blackcoupe01

Well-Known Member
Yes it will work, but its not the best way to do it obviously. You paid good money for that cooltube so why not use its full potential? But go ahead and use it as a vent, just save some money an plan on fixing it up right soon as you can.
 
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bryant228

Well-Known Member
blackcoupe01 said:
Yes it will work, but its not the best way to do it obviously. You paid good money for that cooltube so why not use its full potential? But go ahead and use it as a vent, just save some money an plan on fixing it up right soon as you can.
Click to expand...
He is right. You could have just gotten a regular boxed hooded fan if that is what you wanted to do. Many people use that method. The cool tube is designed to get no air from the room, and pull in fresh, (hopfully) cool air from outside the room. But, like what Blackcouple said, it will work. But just not to the full potential.
 
{Kottonmouth.King}

{Kottonmouth.King}

Well-Known Member
If your cooltube extends close to one side of your box(using cooltube for air extraction) I would think you may want to mount your intake opposite of the cooltube opening. This will allow more air circulation inside. Because if the intake is near the cooltube opening it will just get sucked into the cooltube and completely miss the area away from the opening. Just my 2 cents.


Peace

Ron Paul rEVOLution
 
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